/* schematic-lang.css — Level 2 · The Language (reading schematics). */

/* ── why-diagrams cards ─────────────────────────────────────────────────── */
.lang-why-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  margin-top: 26px; max-width: 760px;
}
.lang-why-card {
  border: 1px solid var(--rule); border-radius: 12px;
  padding: 18px 20px; background: var(--bg-card);
}
.lang-why-card ul { margin: 12px 0 0; padding: 0; list-style: none; }
.lang-why-card li {
  font-size: 15.5px; color: var(--ink-soft); padding: 6px 0 6px 20px; position: relative;
  border-top: 1px solid var(--rule);
}
.lang-why-card li:first-child { border-top: none; }
.lang-why-card li::before {
  content: "›"; position: absolute; left: 4px; color: var(--current); font-weight: 700;
}

/* ── symbol key (the alphabet) ──────────────────────────────────────────── */
.slg-key { display: grid; grid-template-columns: 1.3fr 1fr; gap: 22px; align-items: start; }
.slg-key-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 10px;
}
.slg-key-card {
  appearance: none; cursor: pointer; text-align: center;
  background: var(--bg-card); border: 1.5px solid var(--rule); border-radius: 10px;
  padding: 10px 8px 8px; display: flex; flex-direction: column; align-items: center; gap: 4px;
  transition: border-color 130ms ease, transform 130ms ease, box-shadow 130ms ease;
}
.slg-key-card:hover { border-color: var(--ink-faint); transform: translateY(-1px); }
.slg-key-card.on { border-color: var(--current); box-shadow: 0 0 0 1px var(--current); }
.slg-key-svg { width: 96px; height: 50px; }
.slg-key-name {
  font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; color: var(--ink-soft); line-height: 1.25;
}
.slg-key-card.on .slg-key-name { color: var(--ink); }

.slg-key-detail {
  position: sticky; top: 86px;
  border: 1px solid var(--rule); border-radius: 12px; padding: 20px;
  background: var(--bg-card); display: flex; gap: 16px; align-items: flex-start;
  box-shadow: var(--shadow-card);
}
.slg-key-detail-svg { width: 110px; height: 74px; flex: none; }
.slg-key-detail-name {
  font-family: 'Newsreader', serif; font-size: 22px; color: var(--ink); margin-bottom: 8px;
}
.slg-key-detail-desc { margin: 0; font-size: 15px; line-height: 1.55; color: var(--ink-soft); }

/* ── shared schematic/board svg ─────────────────────────────────────────── */
.sla-svg { display: block; width: 100%; height: auto; }
.sla-lbl {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; fill: var(--current); font-weight: 600;
}

/* ── read-the-loop ──────────────────────────────────────────────────────── */
.sla-loop {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; align-items: center;
  background: var(--bg-card); border: 1px solid var(--rule); border-radius: 14px; padding: 22px;
}
.sla-loop-side { min-width: 0; }
.sla-beat-t {
  font-family: 'Newsreader', serif; font-size: 26px; color: var(--current); line-height: 1.15; margin-bottom: 8px;
  min-height: 30px;
}
.sla-beat-d { font-size: 16px; color: var(--ink); line-height: 1.5; min-height: 48px; }
.sla-loop-btn {
  margin-top: 14px; appearance: none; cursor: pointer;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  padding: 9px 18px; border-radius: 8px; background: var(--ink); color: var(--bg-card); border: none;
}
.sla-loop-btn:hover { background: var(--current); }
.sla-loop-note { margin: 16px 0 0; font-size: 13.5px; font-style: italic; color: var(--ink-soft); line-height: 1.5; }

/* ── schematic ↔ board ──────────────────────────────────────────────────── */
.sla-wrap {
  background: var(--bg-card); border: 1px solid var(--rule); border-radius: 14px; padding: 22px;
}
.sla-tabs { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.sla-tab {
  appearance: none; cursor: pointer;
  font-family: 'IBM Plex Mono', monospace; font-size: 12.5px;
  padding: 8px 16px; border-radius: 20px; background: transparent; color: var(--ink-soft);
  border: 1.5px solid var(--rule-strong); transition: all 130ms ease;
}
.sla-tab:hover { border-color: var(--ink-faint); }
.sla-tab.on { background: var(--current); color: var(--bg-card); border-color: var(--current); }
.sla-blurb { margin: 0 0 18px; font-size: 16px; color: var(--ink-soft); line-height: 1.55; max-width: 60em; }

.sla-panels {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center;
}
.sla-panel {
  margin: 0; border: 1px solid var(--rule); border-radius: 12px; padding: 12px;
  background: var(--bg-deeper);
}
.sla-panel figcaption {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-faint);
}
.sla-cap-tag {
  font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--bg-card); background: var(--ink-soft); padding: 2px 7px; border-radius: 4px;
}
.sla-cap-tag.board { background: var(--current); }
.sla-arrow {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.1em;
}
.sla-arrow-line { font-size: 26px; color: var(--current); line-height: 1; }

.sla-parts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.sla-chip {
  appearance: none; cursor: pointer;
  font-family: 'IBM Plex Mono', monospace; font-size: 12.5px;
  padding: 7px 13px; border-radius: 8px; background: var(--bg-deeper); color: var(--ink-soft);
  border: 1.5px solid var(--rule-strong); transition: all 120ms ease;
}
.sla-chip:hover { border-color: var(--ink-faint); color: var(--ink); }
.sla-chip.on { background: var(--current); color: var(--bg-card); border-color: var(--current); }

.sla-explain {
  margin-top: 14px; padding: 14px 16px; border-radius: 10px;
  background: var(--bg-deeper); border: 1px solid var(--rule);
  font-size: 15px; line-height: 1.55; color: var(--ink-soft); min-height: 30px;
  transition: border-color 140ms ease;
}
.sla-explain.on { border-color: var(--current); color: var(--ink); }
.sla-explain b { color: var(--current); }

@media (max-width: 860px) {
  .slg-key { grid-template-columns: 1fr; }
  .slg-key-detail { position: static; }
  .sla-loop { grid-template-columns: 1fr; }
  .lang-why-grid { grid-template-columns: 1fr; }
  .sla-panels { grid-template-columns: 1fr; }
  .sla-arrow { flex-direction: row; gap: 8px; }
  .sla-arrow-line { transform: rotate(90deg); }
}